.page-faq {
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .help-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(18px, 3vw, 34px) clamp(34px, 5vw, 60px);
}

.page-faq .help-hero::before {
  content: "";
  position: absolute;
  inset: -12% -6% auto -6%;
  height: 128%;
  background:
    linear-gradient(108deg, rgba(232, 215, 186, 0.95) 0%, rgba(232, 215, 186, 0.48) 40%, rgba(247, 240, 227, 0) 68%),
    radial-gradient(circle at 86% 8%, rgba(200, 154, 86, 0.30), transparent 58%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .help-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 42px);
}

.page-faq .help-hero h1 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(29px, 6vw, 58px);
  line-height: 1.14;
  letter-spacing: 0.01em;
  color: var(--ink);
  margin: 0.16em 0 0.42em;
  max-width: 15em;
}

.page-faq .help-hero .lead {
  max-width: 40em;
  color: var(--rock);
}

.page-faq .help-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-faq .help-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin-top: clamp(22px, 3.5vw, 32px);
}

.page-faq .fact {
  border-left: 2px solid var(--gold);
  padding-left: 12px;
}

.page-faq .fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.6vw, 24px);
  color: var(--ochre);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.page-faq .fact__label {
  display: block;
  margin-top: 3px;
  font-size: 12.5px;
  color: var(--rock);
  letter-spacing: 0.03em;
}

/* 首屏右侧高频卡 */
.page-faq .help-hero__board {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--ochre);
  box-shadow: var(--shadow);
  padding: clamp(18px, 3vw, 26px);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.page-faq .board__eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--cinnabar);
  margin: 0 0 6px;
}

.page-faq .board__title {
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-faq .board__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .board-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 8px 11px 0;
  border-bottom: 1px dashed var(--line-strong);
  color: var(--ink);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.5;
  transition: color 0.2s ease, background-color 0.2s ease, padding-left 0.2s ease;
}

.page-faq .board-link:hover,
.page-faq .board-link:focus-visible {
  color: var(--ochre);
  background: rgba(232, 215, 186, 0.55);
  padding-left: 8px;
}

.page-faq .board-link__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--celadon);
  flex: none;
}

.page-faq .board__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--rock);
}

.page-faq .board__note a {
  color: var(--ochre);
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-all;
}

/* ---------- 问题分类 ---------- */
.page-faq .help-index {
  background: linear-gradient(180deg, var(--paper) 0%, var(--sand) 10%, var(--sand) 90%, var(--paper) 100%);
}

.page-faq .help-index__intro {
  display: grid;
  gap: clamp(20px, 3.5vw, 36px);
  align-items: start;
}

.page-faq .help-index h2 {
  font-family: var(--font-serif);
  font-size: clamp(25px, 4.4vw, 40px);
  line-height: 1.2;
  margin: 0.2em 0 0.5em;
  color: var(--ink);
}

.page-faq .help-index__lead p {
  max-width: 40em;
  color: var(--rock);
  line-height: 1.8;
  margin: 0 0 12px;
}

.page-faq .help-index__hint {
  font-size: 14px;
  border-left: 2px solid var(--cinnabar);
  padding-left: 12px;
  color: var(--ochre-deep);
}

.page-faq .help-index__figure {
  margin: 0;
}

.page-faq .help-index__figure .figure__media {
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
}

.page-faq .help-index__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .help-index__grid {
  display: grid;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-faq .help-cat {
  background: rgba(255, 255, 255, 0.62);
  border-top: 3px solid var(--ochre);
  padding: 16px 15px 18px;
  transition: background-color 0.22s ease, transform 0.22s ease;
}

.page-faq .help-cat:nth-child(even) {
  border-top-color: var(--celadon);
}

.page-faq .help-cat:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-3px);
}

.page-faq .help-cat__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin: 0 0 6px;
}

.page-faq .help-cat__title {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.35;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-faq .help-cat__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .help-cat__list li {
  position: relative;
  padding-left: 12px;
  margin-bottom: 7px;
}

.page-faq .help-cat__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 1px;
  background: var(--gold);
}

.page-faq .help-cat__list a {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--rock);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .help-cat__list a:hover,
.page-faq .help-cat__list a:focus-visible {
  color: var(--celadon);
  border-bottom-color: var(--celadon);
}

/* ---------- 正文双栏 ---------- */
.page-faq .help-body {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
  padding-block: clamp(32px, 6vw, 70px);
}

/* 粘性目录 */
.page-faq .help-toc {
  background: rgba(232, 215, 186, 0.42);
  border-left: 3px solid var(--gold);
  padding: 18px 16px 20px;
}

.page-faq .help-toc__title {
  font-family: var(--font-serif);
  font-size: 17px;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
  color: var(--ochre-deep);
  letter-spacing: 0.04em;
}

.page-faq .toc-group + .toc-group {
  margin-top: 16px;
}

.page-faq .toc-group__title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--ochre);
  margin: 0 0 6px;
}

.page-faq .toc-link {
  display: block;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--rock);
  text-decoration: none;
  padding: 5px 0 5px 10px;
  border-left: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.page-faq .toc-link:hover,
.page-faq .toc-link:focus-visible {
  color: var(--ink);
  border-left-color: var(--celadon);
  background: rgba(255, 255, 255, 0.7);
}

/* 章节 */
.page-faq .help-block {
  border-top: 1px solid var(--line);
  padding-block: clamp(24px, 4vw, 42px);
  scroll-margin-top: 90px;
}

.page-faq .help-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .help-block h2 {
  font-family: var(--font-serif);
  font-size: clamp(23px, 3.8vw, 36px);
  line-height: 1.25;
  margin: 0.2em 0 0.55em;
  color: var(--ink);
}

.page-faq .help-block > p {
  max-width: 40em;
  line-height: 1.85;
  color: var(--rock);
  margin: 0 0 14px;
}

.page-faq .help-block__note {
  max-width: 40em;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ochre-deep);
  background: rgba(232, 215, 186, 0.5);
  border-left: 2px solid var(--gold);
  padding: 10px 12px;
  margin: 16px 0 4px;
}

.page-faq .help-block__note a {
  color: var(--ochre);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .help-block__figure {
  margin: 22px 0 10px;
  max-width: 560px;
}

.page-faq .help-block__figure .figure__media {
  border: 1px solid var(--line-strong);
}

.page-faq .help-block__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* 步骤 */
.page-faq .step-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .step {
  display: grid;
  grid-template-columns: minmax(58px, auto) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  background: rgba(232, 215, 186, 0.34);
  border-left: 3px solid var(--gold);
  padding: 14px 15px;
}

.page-faq .step-list--tight .step {
  background: rgba(255, 255, 255, 0.6);
  border-left-color: var(--celadon);
}

.page-faq .step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ochre);
  padding-top: 2px;
}

.page-faq .step__body strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 16.5px;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 3px;
}

.page-faq .step__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
}

/* 双页错位说明 */
.page-faq .leaves {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.page-faq .leaf {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line-strong);
  overflow: hidden;
}

.page-faq .leaf--a {
  background: var(--sand);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.page-faq .leaf--b {
  background: var(--ochre-deep);
  color: var(--paper);
  border-color: var(--ochre-deep);
}

.page-faq .leaf__no {
  position: absolute;
  top: 6px;
  right: 14px;
  font-family: var(--font-serif);
  font-size: clamp(44px, 7vw, 68px);
  line-height: 1;
  font-weight: 800;
  color: rgba(138, 75, 42, 0.16);
  pointer-events: none;
}

.page-faq .leaf--b .leaf__no {
  color: rgba(247, 240, 227, 0.16);
}

.page-faq .leaf__tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  margin: 0 0 8px;
  color: var(--ochre);
}

.page-faq .leaf--b .leaf__tag {
  color: var(--gold);
}

.page-faq .leaf h3 {
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.8vw, 25px);
  line-height: 1.3;
  margin: 0 0 12px;
  color: var(--ink);
}

.page-faq .leaf--b h3 {
  color: var(--paper);
}

.page-faq .leaf__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .leaf__list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 9px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
}

.page-faq .leaf--b .leaf__list li {
  color: rgba(247, 240, 227, 0.88);
}

.page-faq .leaf__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 7px;
  height: 2px;
  background: var(--gold);
}

.page-faq .leaf--b .leaf__list li::before {
  background: var(--celadon);
}

/* 格式对比 */
.page-faq .format-grid {
  display: grid;
  gap: 14px;
  margin: 22px 0 4px;
}

.page-faq .format {
  background: rgba(255, 255, 255, 0.55);
  border-top: 3px solid var(--ochre);
  padding: 16px 16px 18px;
}

.page-faq .format--csv {
  border-top-color: var(--celadon);
}

.page-faq .format__tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--ochre);
  margin: 0 0 6px;
}

.page-faq .format--csv .format__tag {
  color: var(--celadon);
}

.page-faq .format h3 {
  font-family: var(--font-serif);
  font-size: 17.5px;
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-faq .format p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
}

/* 会员数字 */
.page-faq .member-facts {
  margin: 22px 0 6px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
  display: grid;
  gap: 8px;
}

.page-faq .member-facts p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--rock);
}

.page-faq .member-facts strong {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--ochre);
  margin-right: 6px;
}

/* 编号示例 */
.page-faq .code-sample {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 20px 0 6px;
  padding: 14px 16px;
  background: var(--ink);
  border-left: 4px solid var(--cinnabar);
}

.page-faq .code-sample__part {
  font-family: var(--font-mono);
  font-size: clamp(13px, 2.2vw, 17px);
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-faq .code-sample__part--v {
  color: var(--celadon);
  background: rgba(47, 125, 109, 0.18);
  padding: 1px 6px;
}

.page-faq .code-sample__sep {
  font-family: var(--font-mono);
  color: var(--gold);
}

/* 折叠问答 */
.page-faq .q {
  margin-top: 12px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--line);
  border-left: 3px solid var(--sand);
  scroll-margin-top: 92px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .q[open] {
  border-left-color: var(--celadon);
  background: rgba(255, 255, 255, 0.86);
}

.page-faq .q__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  position: relative;
}

.page-faq .q__head::-webkit-details-marker {
  display: none;
}

.page-faq .q__head::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--ochre);
  flex: none;
  margin-left: auto;
  transition: transform 0.2s ease;
}

.page-faq .q[open] .q__head::after {
  content: "−";
  color: var(--celadon);
}

.page-faq .q__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--gold);
  flex: none;
}

.page-faq .q__title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  flex: 1 1 auto;
}

.page-faq .q .tag {
  flex: none;
}

.page-faq .q__body {
  padding: 0 16px 16px;
  border-top: 1px dashed var(--line-strong);
  margin-top: 2px;
  padding-top: 12px;
}

.page-faq .q__body p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--rock);
  max-width: 42em;
}

.page-faq .q__body p:last-child {
  margin-bottom: 0;
}

.page-faq .q__link {
  color: var(--ochre);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .q__link:hover,
.page-faq .q__link:focus-visible {
  color: var(--celadon);
}

/* 联系块 */
.page-faq .contact-box {
  margin-top: 22px;
  background: var(--ochre-deep);
  color: var(--paper);
  padding: clamp(20px, 4vw, 34px);
  display: grid;
  gap: 16px;
  border-top: 4px solid var(--gold);
}

.page-faq .contact-box__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin: 0 0 8px;
}

.page-faq .email-display {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.6vw, 19px);
  color: var(--sand);
  text-decoration: none;
  word-break: break-all;
  border-bottom: 1px solid rgba(232, 215, 186, 0.5);
  padding-bottom: 3px;
}

.page-faq .email-display:hover,
.page-faq .email-display:focus-visible {
  color: #fff;
  border-bottom-color: var(--gold);
}

.page-faq .contact-prep {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  border-top: 1px solid rgba(232, 215, 186, 0.24);
  padding-top: 14px;
}

.page-faq .contact-prep li {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(247, 240, 227, 0.9);
  display: flex;
  gap: 10px;
  align-items: baseline;
}

.page-faq .contact-prep__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--gold);
  flex: none;
}

.page-faq .contact-box__note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(247, 240, 227, 0.72);
  border-left: 2px solid var(--cinnabar);
  padding-left: 10px;
}

.page-faq .contact-box__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-faq .mail-btn {
  display: inline-block;
  padding: 11px 22px;
  background: var(--sand);
  color: var(--ochre-deep);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--sand);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.page-faq .mail-btn:hover,
.page-faq .mail-btn:focus-visible {
  background: var(--gold);
  transform: translateY(-1px);
}

.page-faq .contact-box__link {
  border-color: rgba(232, 215, 186, 0.6);
  color: var(--sand);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .help-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .help-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .format-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .member-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-faq .help-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .help-index__intro {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .help-index__grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .leaves {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    align-items: start;
  }

  .page-faq .leaf--a {
    margin-right: -18px;
    z-index: 2;
  }

  .page-faq .leaf--b {
    margin-top: 46px;
    margin-left: -18px;
    z-index: 1;
  }
}

@media (min-width: 960px) {
  .page-faq .help-body {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    align-items: start;
  }

  .page-faq .help-toc {
    position: sticky;
    top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .help-cat,
  .page-faq .mail-btn,
  .page-faq .board-link,
  .page-faq .toc-link {
    transition: none;
  }

  .page-faq .help-cat:hover,
  .page-faq .mail-btn:hover {
    transform: none;
  }
}